source3/include/g_lock.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    global locks based on dbwrap and messaging
   4    Copyright (C) 2009 by Volker Lendecke
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #ifndef _G_LOCK_H_
  21 #define _G_LOCK_H_
  22
  23 #include "dbwrap.h"
  24
  25 struct g_lock_ctx;
  26
  27 enum g_lock_type {
  28         G_LOCK_READ = 0,
  29         G_LOCK_WRITE = 1,
  30 };
  31
  32 /*
  33  * Or'ed with g_lock_type
  34  */
  35 #define G_LOCK_PENDING (2)
  36
  37 struct g_lock_ctx *g_lock_ctx_init(TALLOC_CTX *mem_ctx,
  38                                    struct messaging_context *msg);
  39
  40 NTSTATUS g_lock_lock(struct g_lock_ctx *ctx, const char *name,
  41                      enum g_lock_type lock_type, struct timeval timeout);
  42 NTSTATUS g_lock_unlock(struct g_lock_ctx *ctx, const char *name);
  43 NTSTATUS g_lock_get(struct g_lock_ctx *ctx, const char *name,
  44                 struct server_id *pid);
  45
  46 NTSTATUS g_lock_do(const char *name, enum g_lock_type lock_type,
  47                    struct timeval timeout, struct server_id self,
  48                    void (*fn)(void *private_data), void *private_data);
  49
  50 int g_lock_locks(struct g_lock_ctx *ctx,
  51                  int (*fn)(const char *name, void *private_data),
  52                  void *private_data);
  53 NTSTATUS g_lock_dump(struct g_lock_ctx *ctx, const char *name,
  54                      int (*fn)(struct server_id pid,
  55                                enum g_lock_type lock_type,
  56                                void *private_data),
  57                      void *private_data);
  58
  59 #endif